LP2983IM5-1.2 Equivalent & Substitute Parts

Part Overview

The LP2983IM5-1.2 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 1.2V output at 150mA in a SOT-23-5 surface mount package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The part provides integrated protection features including over-current, over-temperature, and short-circuit protection, with an enable control feature for power management applications.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Fixed
Voltage - Output (Min/Fixed)	1.2V
Voltage - Input (Max)	16V
Current - Output	150mA
Current - Quiescent (Iq)	95 µA
PSRR	65dB (1kHz)
Protection Features	Over Current, Over Temperature, Short Circuit
Control Features	Enable
Operating Temperature	-40°C ~ 125°C
Package / Case	SC-74A, SOT-753
Supplier Device Package	SOT-23-5
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the LP2983IM5-1.2 is determined by strict electrical and mechanical parameter matching. The critical parameters that define substitutability are:

Output voltage: 1.2V fixed
Output current capability: 150mA
Input voltage range: maximum 16V
Package type: SOT-23-5 (SC-74A, SOT-753)
Protection features: Over-current, over-temperature, short-circuit protection
Control features: Enable function
Quiescent current: 95 µA
PSRR: 65dB at 1kHz
Operating temperature range: -40°C to 125°C

The substitute parts identified maintain identical electrical specifications and mechanical compatibility. Variations in product status, packaging format (Tape & Reel, Cut Tape, Bulk), and RoHS compliance are noted but do not affect functional substitutability in applications where the core electrical and thermal parameters are met.

Parameter Comparison

Parameter	LP2983IM5-1.2	LP2983AIM5X-1.2/NOPB	LP2983IM5-1.2/NOPB	LP2983IM5X-1.2/NOPB
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor
Output Voltage (Fixed)	1.2V	1.2V	1.2V	1.2V
Output Current	150mA	150mA	150mA	150mA
Input Voltage (Max)	16V	16V	16V	16V
Quiescent Current	95 µA	95 µA	95 µA	95 µA
PSRR	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)	65dB (1kHz)
Protection Features	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Product Status	Obsolete	Last Time Buy	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified
Packaging Format	Bulk	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Bulk

Engineering Selection Recommendations

All identified substitute parts maintain complete electrical and mechanical equivalence to the LP2983IM5-1.2. Selection among these alternatives should be based on the following criteria:

For new designs or production requiring RoHS compliance: LP2983AIM5X-1.2/NOPB or LP2983IM5-1.2/NOPB are preferred, as both carry ROHS3 compliance certification.

For active product availability: LP2983IM5X-1.2/NOPB carries Active product status, ensuring long-term supply continuity compared to Last Time Buy or Obsolete designations.

For packaging requirements: LP2983AIM5X-1.2/NOPB is available in Tape & Reel format suitable for automated assembly. LP2983IM5-1.2/NOPB is available in Cut Tape and Digi-Reel format. LP2983IM5X-1.2/NOPB is available in Bulk packaging.

For legacy system maintenance: Any of the three substitute parts provide direct functional replacement for the obsolete LP2983IM5-1.2 without circuit modification, provided the selected part's availability and compliance status align with production requirements.

Frequently Asked Questions (FAQ)

Q: Can LP2983AIM5X-1.2/NOPB directly replace LP2983IM5-1.2 without circuit changes?

A: Yes. Both parts share identical electrical specifications including 1.2V fixed output, 150mA output current, 16V maximum input voltage, 95 µA quiescent current, and 65dB PSRR at 1kHz. The SOT-23-5 package pinout is identical. No circuit modifications are required.

Q: What is the difference between LP2983IM5-1.2/NOPB and LP2983IM5X-1.2/NOPB?

A: The electrical and thermal specifications are identical. The primary differences are manufacturer designation (Texas Instruments vs. National Semiconductor) and product status (Obsolete vs. Active). The "/NOPB" suffix indicates lead-free, RoHS3 compliant versions.

Q: Why is RoHS compliance important for this part?

A: RoHS3 compliance is required for products sold into markets with environmental regulations. The original LP2983IM5-1.2 is RoHS non-compliant. Substitute parts LP2983AIM5X-1.2/NOPB and LP2983IM5-1.2/NOPB provide compliant alternatives for regulated applications.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel, Cut Tape, and Bulk packaging formats contain identical die and electrical characteristics. Packaging format selection is based on assembly process requirements and inventory management, not performance.

Q: Is the LP2983IM5X-1.2/NOPB suitable for long-term production?

A: Yes. This part carries Active product status, indicating ongoing manufacturer support and availability. This is preferable to Last Time Buy or Obsolete designations for sustained production requirements.

Q: What protection features are included in all substitute parts?

A: All substitute parts include over-current protection, over-temperature protection, and short-circuit protection. The enable control feature is present on all variants for power management applications.

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